:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --secondary: #0ea5e9;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --border-focus: #818cf8;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

code, pre {
  font-family: 'JetBrains Mono', monospace;
}

/* Helpers */
.hidden { display: none !important; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.mt-4 { margin-top: 1rem; }
.text-right { text-align: right; }
.text-center { text-align: center !important; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary { background-color: var(--primary); color: #fff; }
.btn-primary:hover { background-color: var(--primary-hover); }

.btn-secondary { background-color: #f1f5f9; color: #334155; border-color: var(--border); }
.btn-secondary:hover { background-color: #e2e8f0; }

.btn-outline { background-color: transparent; border-color: var(--border); color: #334155; }
.btn-outline:hover { background-color: #f8fafc; border-color: #cbd5e1; }

.btn-danger { background-color: #fee2e2; color: #b91c1c; }
.btn-danger:hover { background-color: #fecaca; }

.btn-block { width: 100%; }
.btn-sm { padding: 0.25rem 0.6rem; font-size: 0.75rem; }
.btn-icon { background: none; border: none; font-size: 1rem; cursor: pointer; padding: 0.25rem; border-radius: 4px; }
.btn-icon:hover { background-color: var(--border); }

/* Forms */
.form-group {
  margin-bottom: 1rem;
  text-align: left;
}

label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: #334155;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="datetime-local"],
select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  outline: none;
  background-color: #fff;
  transition: border-color 0.15s;
}

input:focus, select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  background: #1e293b;
  color: #fff;
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.2s ease-out;
}
.toast.success { background: #065f46; border-left: 4px solid var(--success); }
.toast.error { background: #991b1b; border-left: 4px solid var(--danger); }
.toast.warning { background: #854d0e; border-left: 4px solid #f59e0b; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Auth View */
#auth-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  background: var(--bg-card);
  width: 100%;
  max-width: 420px;
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  text-align: center;
}

.brand-header .logo-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.brand-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.tab-header {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Auth Extra Links & Reset Password Form */
.auth-extra-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

.auth-extra-row.text-center {
  justify-content: center;
}

.auth-link {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s ease;
}

.auth-link:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

.auth-subhead {
  text-align: center;
  margin-bottom: 1.25rem;
}

.auth-subhead h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.auth-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0;
}

.otp-input-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.otp-input-group input {
  flex: 1;
  letter-spacing: 2px;
  font-weight: 600;
  text-align: center;
}

.btn-send-otp {
  height: 42px;
  white-space: nowrap;
  padding: 0 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  flex-shrink: 0;
}

#otp-timer-info {
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 500;
}

/* Dashboard Top Nav */
.top-nav {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon-sm { font-size: 1.5rem; }
.brand-title { font-weight: 700; font-size: 1.125rem; color: var(--primary); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.quota-container {
  min-width: 140px;
}

.quota-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.quota-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.quota-bar-fill {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s ease;
}

.user-badge {
  font-size: 0.8125rem;
  font-weight: 500;
  background: #f1f5f9;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
}

/* Dashboard Layout */
.dashboard-body {
  display: flex;
  height: calc(100vh - 61px);
}

.sidebar {
  width: 260px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  overflow-y: auto;
}

.sidebar-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-item {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: #334155;
  cursor: pointer;
  transition: background 0.15s;
}

.nav-item:hover { background-color: #f1f5f9; }
.nav-item.active { background-color: var(--primary-light); color: var(--primary); }

.nav-item-link {
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: #334155;
  text-decoration: none;
}
.nav-item-link:hover { background-color: #f1f5f9; }

.folder-tree {
  margin-left: 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.tree-node {
  padding: 0.35rem 0.5rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  user-select: none;
  transition: background-color 0.15s ease, color 0.15s ease;
  min-height: 28px;
}

.tree-node:hover {
  background-color: #f1f5f9;
}

.tree-node.active {
  font-weight: 600;
  color: var(--primary);
  background-color: #eef2ff;
}

.tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  font-size: 0.65rem;
  color: #64748b;
  cursor: pointer;
  border-radius: 3px;
  flex-shrink: 0;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.tree-toggle:hover {
  color: var(--primary);
  background-color: #e2e8f0;
}

.tree-toggle-spacer {
  display: inline-block;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.tree-node-icon {
  flex-shrink: 0;
  font-size: 0.95rem;
  line-height: 1;
}

.tree-node-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 1.5rem 2rem;
  overflow-y: auto;
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.crumb {
  color: var(--text-muted);
  cursor: pointer;
}
.crumb:hover { color: var(--primary); }
.crumb.active { color: var(--text-main); cursor: default; }

.header-actions {
  display: flex;
  gap: 0.5rem;
}

/* Upload Progress Card */
.upload-progress-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.progress-track {
  height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.15s ease;
}

/* Folders Grid */
.folders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.folder-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.folder-card:hover {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.folder-card-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow: hidden;
  flex: 1;
}

.folder-card-name {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.folder-card-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  opacity: 0.5;
  transition: opacity 0.15s ease;
}

.folder-card:hover .folder-card-actions {
  opacity: 1;
}

/* Files Table */
.files-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.files-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.files-table th {
  background: #f8fafc;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.files-table td {
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.files-table tbody tr:hover {
  background-color: #f8fafc;
}

.files-table td.text-right {
  white-space: nowrap;
}

.folder-link-cell {
  cursor: pointer;
  transition: color 0.15s ease;
}
.folder-link-cell:hover strong {
  color: var(--primary);
  text-decoration: underline;
}

.file-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.file-thumb {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  object-fit: cover;
}

.file-badge {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}

.badge-ready { background: #dcfce7; color: #15803d; }
.badge-pending { background: #fef3c7; color: #b45309; }
.badge-failed { background: #fee2e2; color: #b91c1c; }

.empty-state {
  padding: 4rem 1rem;
  text-align: center;
  color: var(--text-muted);
}
.empty-icon { font-size: 3rem; margin-bottom: 0.75rem; }

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-card {
  background: var(--bg-card);
  padding: 1.75rem;
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}

.modal-large { max-width: 600px; }

/* In-App File Preview Modal */
.modal-preview-card {
  max-width: 960px;
  width: 95vw;
  max-height: 92vh;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.875rem;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  flex-shrink: 0;
}

.modal-preview-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  overflow: hidden;
}

.modal-preview-icon {
  font-size: 1.75rem;
  line-height: 1;
  flex-shrink: 0;
}

.modal-preview-meta {
  min-width: 0;
  overflow: hidden;
}

.modal-preview-meta h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-main);
}

.modal-preview-submeta {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.modal-preview-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.modal-preview-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 0 0.5rem;
  display: flex;
  flex-direction: column;
  min-height: 250px;
  max-height: calc(92vh - 90px);
}

.inapp-preview-box {
  width: 100%;
}

.inapp-preview-box.text-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  margin: 0 auto;
}

#inapp-preview-image-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  text-align: center;
  margin: 0 auto;
  padding: 0.5rem 0;
}

.inapp-preview-full-img {
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.inapp-media-player {
  width: 100%;
  max-width: 800px;
  max-height: 65vh;
  border-radius: var(--radius-sm);
  background: #0f172a;
}

.preview-loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
}

.file-cell.clickable {
  cursor: pointer;
  transition: color 0.15s;
}

.file-cell.clickable:hover strong {
  color: var(--primary);
  text-decoration: underline;
}

.modal-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Confirmation In-App Modal */
.confirm-modal-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.confirm-modal-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.confirm-modal-header h3 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
}

.confirm-modal-message {
  font-size: 0.875rem;
  color: #475569;
  line-height: 1.5;
  margin: 0 0 1.25rem 0;
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

.copy-box {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

/* Public Share Card */
.public-share-card {
  background: var(--bg-card);
  max-width: 880px;
  width: 94%;
  margin: 3rem auto;
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  text-align: center;
}

/* Public Share Banner & Attribution */
.public-share-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.public-share-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
}

.author-avatar {
  font-size: 1.1rem;
}

.badge-view {
  background: #ede9fe;
  color: #6d28d9;
  border: 1px solid #ddd6fe;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
}

.badge-download {
  background: #ecfdf5;
  color: #047857;
  border: 1px solid #a7f3d0;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
}

/* In-Browser File & Code Preview Styles */
.public-preview-container {
  margin: 1.75rem 0 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0f172a;
  text-align: left;
}

/* Code Viewer */
.code-viewer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #1e293b;
  padding: 0.625rem 1rem;
  border-bottom: 1px solid #334155;
  color: #f8fafc;
  font-size: 0.8125rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.code-viewer-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
}

.code-lines-badge {
  background: #334155;
  color: #94a3b8;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

.code-viewer-body {
  display: flex;
  background: #0f172a;
  max-height: 520px;
  overflow: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.55;
}

.code-line-numbers {
  background: #090d16;
  color: #475569;
  padding: 1rem 0.75rem;
  text-align: right;
  user-select: none;
  border-right: 1px solid #1e293b;
  min-width: 2.75rem;
  white-space: pre;
}

.code-content-pre {
  margin: 0;
  padding: 1rem;
  color: #e2e8f0;
  overflow-x: auto;
  flex-grow: 1;
  white-space: pre;
  tab-size: 4;
}

.code-content-pre code {
  font-family: 'JetBrains Mono', monospace;
}

.code-viewer-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.code-view-only-badge {
  background: #334155;
  color: #cbd5e1;
  border: 1px solid #475569;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.view-only-code {
  user-select: none !important;
  -webkit-user-select: none !important;
}

.view-only-code * {
  user-select: none !important;
  -webkit-user-select: none !important;
}

/* Media Previews */
.preview-box {
  background: var(--bg-card);
  width: 100%;
}

.preview-box.text-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  width: 100%;
  margin: 0 auto;
}

#preview-image-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  text-align: center;
  margin: 0 auto;
  padding: 1rem 0;
}

.image-preview-wrapper {
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  max-width: 100%;
  margin: 0 auto;
  text-align: center;
}

.image-view-shield {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  z-index: 10;
  cursor: default;
  user-select: none;
  -webkit-user-select: none;
}

.preview-full-img,
.inapp-preview-full-img {
  max-width: 100%;
  max-height: 72vh;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
}

.preview-full-img.protected {
  user-select: none !important;
  -webkit-user-select: none !important;
  -webkit-user-drag: none !important;
  pointer-events: none !important;
}

.preview-media-player,
.inapp-media-player {
  width: 100%;
  max-width: 800px;
  max-height: 65vh;
  background: #000;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-sm);
}

.audio-player-wrapper {
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  width: 100%;
}

.audio-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.preview-audio-player {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: block;
}

.preview-pdf-frame {
  width: 100%;
  height: 560px;
  border: none;
  display: block;
}

.unsupported-preview-card {
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: var(--bg-card);
}

.unsupported-icon {
  font-size: 3.5rem;
  margin-bottom: 0.75rem;
}

.share-file-preview {
  margin: 2rem 0;
}

.file-large-icon { font-size: 4rem; margin-bottom: 1rem; }
.file-large-thumb { max-width: 200px; max-height: 200px; border-radius: 8px; margin: 0 auto 1rem; }
.share-item-name { font-size: 1.25rem; margin-bottom: 0.5rem; word-break: break-word; overflow-wrap: anywhere; }
.public-share-footer { margin-top: 2rem; border-top: 1px solid var(--border); padding-top: 1.5rem; }

/* Public Shared Folder Browser & Preview Topbar */
.public-preview-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #1e293b;
  color: #f8fafc;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #334155;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}

.preview-active-filename {
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.folder-browser-top {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.public-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.public-breadcrumb-item {
  color: var(--primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 500;
  text-decoration: none;
}

.public-breadcrumb-item:hover {
  text-decoration: underline;
}

.public-breadcrumb-item.active {
  color: var(--text);
  font-weight: 600;
  cursor: default;
  text-decoration: none;
}

.public-breadcrumb-separator {
  color: var(--text-muted);
  user-select: none;
}

.public-folder-download-wrap {
  display: flex;
  align-items: center;
}

.public-folder-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
}

.public-folder-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.825rem;
}

.public-folder-table th {
  background: #f8fafc;
  padding: 0.6rem 0.85rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}

.public-folder-table td {
  padding: 0.6rem 0.85rem;
  font-size: 0.825rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  color: var(--text);
}

.public-folder-table tr.folder-row {
  cursor: pointer;
}

.public-folder-table tr.folder-row:hover {
  background: rgba(99, 102, 241, 0.06);
}

.public-folder-table tr.file-row:hover {
  background: #f8fafc;
}

.public-item-cell {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 500;
}

.public-item-cell .file-name-text {
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.public-action-btns {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.public-action-btns .btn {
  padding: 0.25rem 0.55rem;
  font-size: 0.75rem;
}

/* PDF Canvas Viewer Styles (View-Only Protected Mode & In-App Preview) */
.pdf-canvas-container {
  display: block;
  text-align: center;
  width: 100%;
  max-width: 100%;
  background: #f1f5f9;
  border-radius: 8px;
  padding: 0.75rem 0.5rem;
  overflow: auto;
  max-height: 80vh;
  box-sizing: border-box;
  -webkit-overflow-scrolling: touch;
}

.pdf-toolbar,
.pdf-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  background: #ffffff;
  padding: 0.4rem 0.75rem;
  border-radius: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 15;
  flex-wrap: wrap;
}

.pdf-nav-btns,
.pdf-zoom-btns {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pdf-page-num,
.pdf-page-display {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
}

.pdf-controls-sep {
  color: var(--border);
  font-weight: 300;
  user-select: none;
}

.pdf-zoom-display {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 44px;
  text-align: center;
  user-select: none;
}

.pdf-canvas-wrapper {
  position: relative;
  display: inline-block;
  margin: 0 auto;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.14);
  border-radius: 4px;
  background: #ffffff;
}

#pdf-render-canvas,
#inapp-pdf-render-canvas,
.pdf-canvas-container canvas {
  display: inline-block;
  vertical-align: top;
  margin: 0 auto;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.14);
  border-radius: 4px;
  background: #ffffff;
}

/* Single Row Header Toolbar & Unified Control Sizing */
.single-row-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.single-row-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
  white-space: nowrap;
  margin: 0;
  line-height: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
}

/* Trash Section Header & Split Toolbar */
.trash-header {
  margin-bottom: 0.875rem;
}

.trash-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 0;
  line-height: 1.2;
}

.trash-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  width: 100%;
  flex-wrap: wrap;
}

.trash-toolbar-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.trash-toolbar-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-left: auto;
}

/* Search Box - Standardized & Fully Displayed */
.search-box-compact {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 155px;
  height: 32px;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  flex-shrink: 0;
}

.search-box-compact input {
  width: 100%;
  height: 32px;
  line-height: 30px;
  padding: 0 1.4rem 0 1.75rem;
  font-size: 0.75rem;
  font-family: inherit;
  background: #ffffff;
  border-radius: var(--radius-sm);
  border: 1px solid #cbd5e1;
  box-sizing: border-box;
  margin: 0;
  vertical-align: middle;
}

.search-box-compact input::placeholder {
  color: #94a3b8;
  font-size: 0.75rem;
}

.search-box-compact input:focus {
  border-color: var(--primary);
  outline: none;
}

.search-box-compact .search-icon {
  position: absolute;
  left: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
  color: #64748b;
  pointer-events: none;
  line-height: 1;
  display: flex;
  align-items: center;
}

.search-box-compact .btn-clear {
  position: absolute;
  right: 0.35rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #64748b;
  cursor: pointer;
  padding: 0.1rem 0.25rem;
  font-size: 0.7rem;
  border-radius: 50%;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.search-box-compact .btn-clear:hover {
  background: var(--border);
  color: var(--text-main);
}

/* Filter & Sort Dropdowns - Reduced Size */
.form-select-compact {
  width: 98px;
  height: 34px;
  line-height: 32px;
  padding: 0 0.35rem;
  font-size: 0.75rem;
  font-family: inherit;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: var(--text-main);
  cursor: pointer;
  box-sizing: border-box;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 0;
  vertical-align: middle;
  flex-shrink: 0;
}

.form-select-mini {
  width: 90px !important;
  height: 32px !important;
  font-size: 0.72rem !important;
  padding: 0 0.3rem !important;
  border-color: #cbd5e1 !important;
  background-color: #f8fafc !important;
}

.form-select-mini:hover {
  background-color: #f1f5f9 !important;
  border-color: #94a3b8 !important;
}

.form-select-compact:focus {
  outline: none;
  border-color: var(--border-focus);
}

.form-select-compact:hover {
  border-color: #cbd5e1;
  background-color: #f8fafc;
}

/* Action Buttons - Identical Sizing (New Folder, Trash Contents, Refresh) */
.btn-action {
  height: 36px;
  min-width: 120px;
  padding: 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  box-sizing: border-box;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  margin: 0;
  vertical-align: middle;
  flex-shrink: 0;
}

.btn-outline-danger {
  background-color: transparent;
  border-color: #fecaca;
  color: #b91c1c;
}
.btn-outline-danger:hover {
  background-color: #fee2e2;
  border-color: #fca5a5;
}

/* Sortable Table Headers */
.sortable-th, .sortable-shares-th, .sortable-trash-th {
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease;
}
.sortable-th:hover, .sortable-shares-th:hover, .sortable-trash-th:hover {
  color: var(--primary);
}
.sort-icon {
  display: inline-block;
  font-size: 0.75rem;
  margin-left: 0.25rem;
  opacity: 0.4;
}
.sort-asc .sort-icon {
  opacity: 1;
  color: var(--primary);
}
.sort-desc .sort-icon {
  opacity: 1;
  color: var(--primary);
}

/* --- Admin Dashboard Styles --- */
.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  font-size: 2rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-main);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  margin: 0.125rem 0;
}

.stat-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.subsection-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
}

.section-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: block;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1;
}

.badge-admin {
  background-color: #fef3c7;
  color: #92400e;
  border: 1px solid #fcd34d;
}

.badge-user {
  background-color: #f1f5f9;
  color: #475569;
  border: 1px solid #cbd5e1;
}

.badge-active {
  background-color: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.badge-disabled {
  background-color: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* Quota Mini Bar in Table */
.user-quota-cell {
  min-width: 160px;
}

.user-quota-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.user-quota-bar-bg {
  width: 100%;
  height: 6px;
  background-color: var(--border);
  border-radius: 9999px;
  overflow: hidden;
}

.user-quota-bar-fill {
  height: 100%;
  background-color: var(--primary);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

.user-quota-bar-fill.warning {
  background-color: var(--warning);
}

.user-quota-bar-fill.danger {
  background-color: var(--danger);
}

.quota-preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.375rem;
}

.quota-preset-btn.active {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* Refresh Button Spinning Icon Animation */
.inline-spin {
  display: inline-block;
  animation: inline-spin-anim 0.75s linear infinite;
}

@keyframes inline-spin-anim {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.img-loading-preview {
  filter: blur(4px);
  transition: filter 0.3s ease;
}

/* ==========================================================================
   Mobile Responsive Navigation & Drawer Components
   ========================================================================== */

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  cursor: pointer;
  margin-right: 0.5rem;
  transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* Sidebar Drawer Backdrop */
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(3px);
  z-index: 1040;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.sidebar-backdrop.hidden {
  display: none;
  opacity: 0;
}

/* Sidebar Mobile Header */
.sidebar-mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-mobile-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-close-btn {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
}

.sidebar-close-btn:hover {
  background: #f1f5f9;
  color: var(--text-main);
}

/* Sidebar Mobile User Card */
.sidebar-mobile-user-card {
  display: none;
  flex-direction: column;
  gap: 0.625rem;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.mobile-user-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
}

.mobile-user-avatar {
  font-size: 1.25rem;
}

.mobile-user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow: hidden;
  flex: 1;
}

.mobile-user-email {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mobile-quota-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-quota-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
/* ==========================================================================
   Mobile UI Elements (Hidden on Desktop by Default)
   ========================================================================== */

.mobile-bottom-nav,
.mobile-fab-container,
.mobile-action-sheet-backdrop,
.mobile-action-sheet,
.mobile-more-btn,
.mobile-item-meta,
.mobile-only {
  display: none !important;
}

.desktop-action-buttons {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* Tablet (<= 1024px) */
@media (max-width: 1024px) {
  .admin-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile & Small Tablets (<= 768px) */
@media (max-width: 768px) {
  /* Prevent background scrolling when mobile drawer is open */
  body.sidebar-open {
    overflow: hidden;
  }

  .desktop-only,
  .desktop-only-cell,
  .desktop-action-buttons {
    display: none !important;
  }

  /* Top Navigation */
  .top-nav {
    padding: 0 1rem;
    height: 56px;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .nav-right {
    gap: 0.5rem;
  }

  .quota-container {
    display: none; /* Shown in mobile drawer */
  }

  .user-badge {
    max-width: 130px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
  }

  /* Off-canvas Sidebar Drawer */
  .dashboard-body {
    position: relative;
    overflow-x: hidden;
    height: calc(100vh - 56px);
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    max-width: 82vw;
    background: #ffffff;
    z-index: 1050;
    box-shadow: 4px 0 24px rgba(15, 23, 42, 0.2);
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-mobile-header {
    display: flex;
  }

  .sidebar-mobile-user-card {
    display: flex;
  }

  /* Main Content Layout */
  .main-content {
    padding: 1rem 0.75rem calc(160px + env(safe-area-inset-bottom)) 0.75rem;
    width: 100%;
    box-sizing: border-box;
  }

  /* Toolbars & Action Bars */
  .content-header,
  .single-row-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    margin-bottom: 1rem;
  }

  .breadcrumbs {
    font-size: 0.9375rem;
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 0.25rem;
  }

  .header-actions {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    gap: 0.5rem;
  }

  .search-box-compact {
    width: 100%;
    flex: 1 1 100%;
    min-width: 0;
    height: 38px;
  }

  .search-box-compact input {
    height: 38px;
    font-size: 16px; /* Prevents iOS Safari auto-zoom */
    padding-left: 2rem;
  }

  .form-select-compact {
    height: 38px;
    font-size: 14px;
    flex: 1 1 calc(50% - 0.25rem);
    min-width: 120px;
  }

  .btn-action {
    height: 38px;
    font-size: 0.8125rem;
    padding: 0 0.75rem;
    flex: 1 1 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Trash Toolbar */
  .trash-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .trash-toolbar-left,
  .trash-toolbar-right {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-left: 0;
  }

  .trash-toolbar-left .search-box-compact {
    width: 100%;
  }

  .trash-toolbar-right .btn-action {
    flex: 1 1 calc(50% - 0.25rem);
  }

  /* Mobile Touch Cards for Data Tables (Zero Horizontal Scrolling & Full Filename Wrapping) */
  .files-container,
  .shares-table-container,
  .trash-container,
  .admin-users-table-wrapper,
  .public-folder-table-wrapper {
    overflow-x: hidden !important;
    max-width: 100% !important;
    width: 100% !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 0 calc(130px + env(safe-area-inset-bottom)) 0 !important;
    box-sizing: border-box !important;
  }

  .files-table,
  .shares-table,
  .trash-table,
  .admin-users-table,
  .public-folder-table {
    min-width: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    display: block !important;
    border-collapse: separate !important;
    border-spacing: 0 !important;
  }

  .files-table thead,
  .shares-table thead,
  .trash-table thead,
  .admin-users-table thead,
  .public-folder-table thead {
    display: none !important;
  }

  .files-table tbody,
  .shares-table tbody,
  .trash-table tbody,
  .admin-users-table tbody,
  .public-folder-table tbody {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.625rem !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  .files-table tr,
  .shares-table tr,
  .trash-table tr,
  .admin-users-table tr,
  .public-folder-table tr {
    display: flex !important;
    flex-direction: row !important;
    align-items: flex-start !important;
    justify-content: space-between !important;
    padding: 0.75rem 0.875rem !important;
    background: var(--bg-card) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-sm) !important;
    box-sizing: border-box !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    transition: background 0.15s ease, transform 0.15s ease;
    touch-action: manipulation;
  }

  .files-table tr:active,
  .shares-table tr:active,
  .trash-table tr:active,
  .admin-users-table tr:active,
  .public-folder-table tr:active {
    background: #f1f5f9 !important;
  }

  .files-table td:first-child,
  .shares-table td:first-child,
  .trash-table td:first-child,
  .admin-users-table td:first-child,
  .public-folder-table td:first-child {
    display: flex !important;
    flex: 1 1 auto !important;
    min-width: 0 !important;
    max-width: calc(100% - 50px) !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
  }

  .files-table td:last-child,
  .shares-table td:last-child,
  .trash-table td:last-child,
  .admin-users-table td:last-child,
  .public-folder-table td:last-child {
    display: flex !important;
    flex: 0 0 auto !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
    margin-left: 0.35rem !important;
    justify-content: flex-end !important;
    align-items: flex-start !important;
  }

  .files-table td:not(:first-child):not(:last-child),
  .shares-table td:not(:first-child):not(:last-child),
  .trash-table td:not(:first-child):not(:last-child),
  .admin-users-table td:not(:first-child):not(:last-child),
  .public-folder-table td:not(:first-child):not(:last-child) {
    display: none !important;
  }

  .file-cell,
  .file-name-cell,
  .public-item-cell {
    display: flex !important;
    align-items: flex-start !important;
    gap: 0.65rem !important;
    min-width: 0 !important;
    max-width: 100% !important;
    flex: 1 1 auto !important;
    overflow: hidden !important;
  }

  .file-cell .file-icon,
  .file-name-cell .file-icon,
  .public-item-cell .file-icon,
  .file-thumb {
    flex-shrink: 0 !important;
    margin-top: 1px !important;
  }

  .file-item-info {
    display: flex !important;
    flex-direction: column !important;
    min-width: 0 !important;
    max-width: 100% !important;
    flex: 1 1 auto !important;
    overflow: hidden !important;
    word-break: break-word !important;
  }

  .file-item-name,
  .file-cell strong,
  .file-name-cell strong {
    font-size: 0.9375rem !important;
    font-weight: 600 !important;
    color: var(--text-main) !important;
    white-space: normal !important;
    word-break: break-word !important;
    overflow-wrap: anywhere !important;
    line-height: 1.4 !important;
    display: block !important;
  }

  .mobile-item-meta {
    display: flex !important;
    align-items: center !important;
    flex-wrap: wrap !important;
    gap: 0.35rem !important;
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    white-space: normal !important;
    word-break: break-word !important;
    margin-top: 3px !important;
  }

  .mobile-item-meta .file-badge,
  .mobile-item-meta .badge {
    font-size: 0.65rem !important;
    padding: 1px 5px !important;
  }

  .mobile-more-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 44px !important;
    height: 44px !important;
    border-radius: 50% !important;
    background: transparent !important;
    border: none !important;
    font-size: 1.35rem !important;
    font-weight: bold !important;
    color: var(--text-muted) !important;
    cursor: pointer !important;
    touch-action: manipulation !important;
    -webkit-tap-highlight-color: transparent !important;
    transition: background 0.15s ease, color 0.15s ease !important;
    flex-shrink: 0 !important;
  }

  .mobile-more-btn:active {
    background: rgba(0, 0, 0, 0.08) !important;
    color: var(--text-main) !important;
  }

  /* Slide-Up Bottom Sheet Modals on Mobile */
  .modal {
    align-items: flex-end !important;
    padding: 0 !important;
  }

  .modal-card,
  .modal-large {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    border-radius: 20px 20px 0 0 !important;
    max-height: 88vh !important;
    padding: 1.25rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom)) 1.25rem !important;
    overflow-y: auto !important;
    box-sizing: border-box !important;
  }

  .modal-actions {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .modal-actions .btn {
    flex: 1 1 calc(50% - 0.25rem);
    text-align: center;
    justify-content: center;
  }

  /* Mobile Bottom Navigation Bar */
  .mobile-bottom-nav {
    display: flex !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 60px !important;
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border-top: 1px solid var(--border) !important;
    z-index: 1000 !important;
    padding-bottom: env(safe-area-inset-bottom) !important;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05) !important;
    justify-content: space-around !important;
    align-items: center !important;
  }

  .mobile-nav-item {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    flex: 1 !important;
    height: 100% !important;
    background: transparent !important;
    border: none !important;
    outline: none !important;
    color: var(--text-muted) !important;
    font-size: 0.7rem !important;
    font-weight: 500 !important;
    cursor: pointer !important;
    transition: color 0.15s ease, transform 0.15s ease !important;
    padding: 4px 0 !important;
    touch-action: manipulation !important;
    -webkit-tap-highlight-color: transparent !important;
  }

  .mobile-nav-item.hidden,
  .mobile-nav-item[hidden],
  #btn-mobile-nav-admin.hidden,
  #nav-admin-dashboard.hidden,
  #admin-badge.hidden,
  #mobile-admin-badge.hidden {
    display: none !important;
  }

  .pdf-toolbar,
  .pdf-controls-bar {
    justify-content: center !important;
    gap: 0.35rem !important;
    padding: 0.35rem 0.5rem !important;
  }

  .mobile-nav-item .mobile-nav-icon {
    font-size: 1.25rem !important;
    margin-bottom: 2px !important;
    transition: transform 0.15s ease !important;
  }

  .mobile-nav-item.active {
    color: var(--primary) !important;
    font-weight: 600 !important;
  }

  .mobile-nav-item.active .mobile-nav-icon {
    transform: scale(1.15) !important;
  }

  .mobile-nav-item:active {
    transform: scale(0.92) !important;
  }

  /* Mobile Floating Action Button (FAB) */
  .mobile-fab-container {
    display: block !important;
    position: fixed !important;
    bottom: calc(72px + env(safe-area-inset-bottom)) !important;
    right: 1.25rem !important;
    z-index: 999 !important;
  }

  .mobile-fab-main-btn {
    width: 54px !important;
    height: 54px !important;
    border-radius: 50% !important;
    background: linear-gradient(135deg, var(--primary) 0%, #4338ca 100%) !important;
    color: #ffffff !important;
    border: none !important;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.45) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    outline: none !important;
    touch-action: manipulation !important;
    -webkit-tap-highlight-color: transparent !important;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease !important;
  }

  .mobile-fab-main-btn:active {
    transform: scale(0.92) !important;
  }

  .mobile-fab-main-btn.active {
    transform: rotate(45deg) !important;
    background: #475569 !important;
    box-shadow: 0 4px 14px rgba(71, 85, 105, 0.4) !important;
  }

  .fab-main-icon {
    font-size: 1.75rem !important;
    line-height: 1 !important;
    display: block !important;
    pointer-events: none !important;
  }

  .mobile-fab-menu {
    position: absolute !important;
    bottom: 64px !important;
    right: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 0.625rem !important;
    align-items: flex-end !important;
    pointer-events: auto !important;
    transition: opacity 0.2s ease, transform 0.2s ease !important;
  }

  .mobile-fab-menu.hidden {
    opacity: 0 !important;
    pointer-events: none !important;
    transform: translateY(10px) scale(0.95) !important;
    display: none !important;
  }

  .mobile-fab-item-btn {
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.625rem !important;
    background: var(--bg-card) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border) !important;
    padding: 0.625rem 1rem !important;
    border-radius: 24px !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12) !important;
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    white-space: nowrap !important;
    touch-action: manipulation !important;
    transition: background 0.15s ease, transform 0.15s ease !important;
  }

  .mobile-fab-item-btn:active {
    transform: scale(0.95) !important;
    background: #f1f5f9 !important;
  }

  .fab-item-icon {
    font-size: 1.15rem !important;
  }

  /* Mobile Action Sheet (Slide-Up Bottom Sheet) */
  .mobile-action-sheet-backdrop {
    display: block !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background: rgba(15, 23, 42, 0.55) !important;
    backdrop-filter: blur(4px) !important;
    -webkit-backdrop-filter: blur(4px) !important;
    z-index: 2000 !important;
    opacity: 1 !important;
    transition: opacity 0.25s ease !important;
  }

  .mobile-action-sheet-backdrop.hidden {
    opacity: 0 !important;
    pointer-events: none !important;
    display: none !important;
  }

  .mobile-action-sheet {
    display: flex !important;
    flex-direction: column !important;
    position: fixed !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    max-height: 85vh !important;
    background: var(--bg-card) !important;
    border-top-left-radius: 20px !important;
    border-top-right-radius: 20px !important;
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.2) !important;
    z-index: 2001 !important;
    padding: 0.75rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom)) 1.25rem !important;
    transform: translateY(0) !important;
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1) !important;
    box-sizing: border-box !important;
    overflow-y: auto !important;
  }

  .mobile-action-sheet.hidden {
    transform: translateY(100%) !important;
    pointer-events: none !important;
    display: none !important;
  }

  .mobile-action-sheet-handle-bar {
    width: 100% !important;
    display: flex !important;
    justify-content: center !important;
    padding-bottom: 0.75rem !important;
  }

  .mobile-action-sheet-handle {
    width: 36px !important;
    height: 4px !important;
    background: var(--border) !important;
    border-radius: 2px !important;
  }

  .mobile-action-sheet-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    padding-bottom: 0.875rem !important;
    border-bottom: 1px solid var(--border) !important;
    margin-bottom: 0.5rem !important;
  }

  .mobile-sheet-item-preview {
    display: flex !important;
    align-items: center !important;
    gap: 0.75rem !important;
    min-width: 0 !important;
    flex: 1 !important;
  }

  .mobile-sheet-icon {
    font-size: 1.75rem !important;
    flex-shrink: 0 !important;
  }

  .mobile-sheet-icon img {
    width: 36px !important;
    height: 36px !important;
    border-radius: 6px !important;
    object-fit: cover !important;
  }

  .mobile-sheet-info {
    min-width: 0 !important;
    flex: 1 !important;
  }

  .mobile-sheet-title {
    margin: 0 !important;
    font-size: 0.95rem !important;
    font-weight: 600 !important;
    color: var(--text-main) !important;
    white-space: normal !important;
    word-break: break-word !important;
    overflow-wrap: anywhere !important;
    line-height: 1.35 !important;
  }

  .modal-preview-title-wrap {
    min-width: 0 !important;
    max-width: calc(100% - 110px) !important;
    overflow: hidden !important;
  }

  .modal-preview-meta {
    min-width: 0 !important;
    max-width: 100% !important;
    overflow: hidden !important;
  }

  .modal-preview-meta h3 {
    white-space: normal !important;
    word-break: break-word !important;
    overflow-wrap: anywhere !important;
    font-size: 0.95rem !important;
    line-height: 1.35 !important;
  }

  .mobile-sheet-subtitle {
    margin: 2px 0 0 0 !important;
    font-size: 0.75rem !important;
    color: var(--text-muted) !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
  }

  .mobile-sheet-close-btn {
    background: transparent !important;
    border: none !important;
    font-size: 1.5rem !important;
    color: var(--text-muted) !important;
    cursor: pointer !important;
    width: 36px !important;
    height: 36px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    border-radius: 50% !important;
    flex-shrink: 0 !important;
    touch-action: manipulation !important;
  }

  .mobile-sheet-actions {
    display: flex !important;
    flex-direction: column !important;
    gap: 0.35rem !important;
    padding-top: 0.25rem !important;
  }

  .mobile-sheet-action-item {
    display: flex !important;
    align-items: center !important;
    gap: 0.875rem !important;
    width: 100% !important;
    padding: 0.85rem 0.75rem !important;
    background: transparent !important;
    border: none !important;
    border-radius: 10px !important;
    font-size: 0.95rem !important;
    font-weight: 500 !important;
    color: var(--text-main) !important;
    text-align: left !important;
    cursor: pointer !important;
    touch-action: manipulation !important;
    -webkit-tap-highlight-color: transparent !important;
    transition: background 0.15s ease !important;
  }

  .mobile-sheet-action-item:active {
    background: rgba(0, 0, 0, 0.05) !important;
  }

  .mobile-sheet-action-item.action-danger {
    color: var(--danger) !important;
  }

  .mobile-sheet-action-icon {
    font-size: 1.25rem !important;
    width: 28px !important;
    display: inline-flex !important;
    justify-content: center !important;
  }

  /* Admin Stats */
  .admin-stats-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  /* Public Share View */
  .public-share-card {
    padding: 1.25rem 0.875rem;
    border-radius: var(--radius-md);
  }

  .share-file-preview {
    padding: 1.25rem 0.5rem;
  }

  .code-viewer-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .code-viewer-actions {
    width: 100%;
    justify-content: space-between;
  }

  .code-viewer-body {
    max-height: 360px;
    font-size: 12px;
  }
}

/* Extra Small Devices / Phones (<= 480px) */
@media (max-width: 480px) {
  .top-nav .user-badge {
    display: none; /* Shown inside mobile drawer */
  }

  .brand-title {
    font-size: 1.05rem;
  }

  /* Auth Card */
  #auth-view {
    padding: 1rem 0.75rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .auth-card {
    padding: 1.5rem 1rem;
    width: 100%;
    margin: 0;
  }

  .otp-input-group {
    display: flex;
    flex-direction: row;
    gap: 0.375rem;
  }

  .otp-input-group input {
    flex: 1 1 50%;
    min-width: 0;
    font-size: 16px !important;
  }

  .btn-send-otp {
    flex: 0 0 auto;
    font-size: 0.75rem;
    padding: 0 0.625rem;
  }

  /* iOS Safari Auto-Zoom Fix */
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="number"],
  select,
  textarea {
    font-size: 16px !important;
  }

  .header-actions .form-select-compact {
    flex: 1 1 100%;
  }

  .folders-grid {
    grid-template-columns: 1fr;
    gap: 0.625rem;
  }
}

/* --- Table Skeleton & Fast Navigation Styles --- */
.folder-skeleton-row td {
  padding: 0.85rem 1rem !important;
  vertical-align: middle;
}

.skeleton-shimmer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
}

.skeleton-box {
  background: linear-gradient(90deg, rgba(150, 150, 150, 0.1) 25%, rgba(150, 150, 150, 0.22) 37%, rgba(150, 150, 150, 0.1) 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.2s ease infinite;
  border-radius: 4px;
}

@keyframes skeleton-loading {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

.skeleton-icon {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  flex-shrink: 0;
}

.skeleton-title {
  width: 40%;
  max-width: 240px;
  height: 14px;
}

.skeleton-sm {
  width: 60px;
  height: 12px;
}

.skeleton-badge {
  width: 55px;
  height: 18px;
  border-radius: 12px;
}